Meanwhile, his Macau unit, which generates about 70 percent of Wynn Resorts’ revenue, opened sharply lower on Monday on the Chinese stock index and fell 6.5 percent to close at HK$28.05.

In a further spell of bad news, the Massachusetts Gaming Commission claimed it would be reviewing the US$2 billion Wynn Boston Harbor project. The commission said in a statement it “is now aware of and is taking very seriously the troubling allegations detailed in The Wall Street Journal article.”

"Massachusetts casino law requires the commission to consider the 'integrity, honesty, good character and reputation of the applicant' when considering bids for a gaming license."

JP Morgan wrote a note to its clients as well over the weekend’s news, stating that "We think the news reports alleging sexual harassment by Steve Wynn creates a sizable overhang in the shares and see value that compensates investors for risk related to these allegations at the ~$150 level, versus the ~$180 level it last traded on Friday."